VHS analog capture with Blackmagic is black screen?
My setup
Acer TC-780 (w/ 16GB ram) -500GB SSD / 7.4TB 4 HDD partition (via Stablebit) USB3 Blackmagic Intensity shuttle -Black Magic Media Express // DaVinci Resolve Studio JVC HD-VP683U The problem I am having is quite literally my Capture device (BMD Intensity shuttle) is black screening the VCR menu & I am having issues with a seemingly random selection of VHS tapes having blank frames end up spread-out within the capture. (no matter the source that can open the device, VLC player & OBS tested directly) I am looking for TBC solutions, but have come up exceptionally empty handed with any useful information. I'm looking for something that can produce a clean timing signal so my device doesn't drop the audio & bonus if I can get the VCR menu to show up in the capture (so I can actually fine tune my vcr settings without the need of a TV monitor on the same desk) Name: AVToolbox AVT8710 - is one I've come across, TBC wise.. there hasn't really been anything or reviews on how it works or how well it works with a Intensity Shuttle (or Pro) Sima GoDVD CT- 1/2/100/200 have cropped up & proven interesting getting my attention on 'producing a constant stream'* [half finished thought] I'm more at a loss of frustration than anything else. I want to avoid any upscalers as I can and honestly prefer to keep the footage @ the resolution it was stored at in the VHS tape. (mine being NTSC) @ SD (720x486) There any solutions that have measurable results without changing the Capture PC/Device? -- it works perfectly for newer analog devices. [I just need to get these blank screens to stop or a way to fix them] |
Try a DVD recorder like the ES15 in the stream.
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See: http://www.digitalfaq.com/forum/vide...ing-guide.html Blackmagic cards are also problematic with SD soruces, VHS especially, and are known to dupe/drop frames without reporting. You want see it until frame-by-frame editing the footage. It can disrupt motion when casually viewing, viewers wil know something is wrong. Quote:
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And then I currently have some TBCs in the marketplace subforum. :wink2: Quote:
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See: http://www.digitalfaq.com/forum/vcr-...-8710-doa.html Quote:
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DePhoegon if you have a USB3 Hub use it to get more stable power to the Blackmagic Intensity shuttle
my Blackmagic Intensity shuttle USB3 start to work much better when i did buy this powered usb 3 hub https://www.amazon.com/StarTech-com-.../dp/B004DVEWH4 and don“t use long usb3 cable |
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None of that will affect black-frame on VHS, for which the direct cause is lack of TBC. :book: |
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It seems that this BM has a too many problems compared to the mxo2.
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As noted, a DVD recorder like a panasonic es10/es15 can help stabilize video signal and avoid the flashes, at for tapes without copy protection. (Though some can have side effects and/or brightness issues in some cases). In PAL land at least you even can capture from the component or HDMI (with HDMI splitter to avoid HDCP) output, not sure if all NTSC ones support 480i over component and/or hdmi, in that case use S-Video out instead. I've found the BM to work okay in this sort of setup (for PAL at least), though I had issues with noise on the S-Video in. Nowadays I use it to capture using the HDMI out from either a Sony RDR-HX750, or Panasonic DMR-EH57
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The Intensity Shuttle does not handle composite, or S-video well at all. between noise with both inputs, to considerable dot crawl especially along white/red boundaries with it's 2D comb filter on the composite input, if you can HDMI into it, it fares much better.
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Don’t buy a TBC unless you need to. An ES10 has frame sync capabilities and will work just fine for the vast majority of tapes. It only chokes on really nasty tapes. I have a large collection of tapes (+8000) in almost every format: VHS, Betamax, V2000, Betacam, 8mm…). Only a small percentage needed the help of my TBC-1000. The edge of these devices are with the most problematic tapes with lots of time base errors. As for MV… just put a scrubber in front of your ES10 and voilą.
You guys are spending high $xxx on something you really don’t need and think you will be recovering all your investment when reselling it. You won’t… I’ve discussed this same topic with a good friend of mine who happens to work in the broadcast industry and he agreed on this 100%. Only those dealing constantly with really nasty tapes will benefit from a full frame TBC. You will need though a good S-VHS deck with line level TBC/NR circuitry. This is not optional. And for the record… I own myself a TBC-1000. I only use it for stripping Macrovision when my scrubber has problems doing so, which is not very often. And for those tapes that are really in bad shape. For the rest, the ES10 is more than enough. |
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That workflow is JVC (TBC off) > ES10/15 for line timing correction > full-frame TBC > capture card or DVD recorders So again, the ES10/15 is a DVD recorder with some interesting features, not a TBC. Not a TBC. NOT A TBC! :P Yes, sometimes the ES10/15 alone suffices, rarely, and the tapes squeak by with decent conversion. But more often than not, the person is missing something. For example, not seeing the flaws on a tiny PC preview window or phone (and not watching the footage on a normal 55" HDTV). Quote:
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I've never had an issue with my DMR-ES15 or ES25. Even when fed VCR analog tuner noise or unrecorded VHS (both are non-video signals) they sample it into video, add Hsync & Vsync, and downstream capture devices never drop frames. |
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To add, the ES10/15 alone will not suffice. That's just wrong advice. It has no frame sync TBC, and is why ES10/15 output can drop frames. However, the DataVideo DVK units, or TBC-5000, will add the frame ability. (Inversely, those units tend to choke on line-untimed signals, and often will not suffice alone either, especially on non-master VHS sources.) When ES10/15+DVK is in use, that gives a 99% effective performance, though again with the aforementioned negatives of the ES10/15 processing. But if you want to have TBC, without buying one, it suffices as a "poor man's TBC".
This setup is generally best for straight archiving, not restoration. The ES10 processing makes restoration exceedingly difficult, though the damage doesn't quite rise to the level of DV conversion (50%+ loss), or lossy compression. As I often have to mention, I don't own TBCs because I like to buy expensive hardware. In fact, these discoveries were precisely because I wanted to avoid buying TBCs. However, it just wasn't feasible. It is what it is. Suck it up, buy the TBC. Use it, resell it, it holds resale value. If your hobby is video, then just realize hobbies cost money. And a $500-$1k TBC is inexpensive compared to the equipment for most hobbies (cameras, cars, vinyl/movie collections, etc). I'm all for economical solutions. But the standard JVC S-VHS VCR > external TBC > capture card is the economical solution! Again, as covered here: What’s in a Professional Video Workflow to Convert Analog Videotapes? |
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Dropped frames are caused by lack of frame sync TBC. This is why ES10/15 alone does not work. I have a feeling that many of your "fine" captures are actually not fine, and are dropping frames, but the skew isn't ye noticeable. Or you've not closely previewed the captures. As mentioned, if not watching, you miss things. I made the mistake early on of capturing video, even monitoring the frame drop counter, and later learning the capture was fubar. BTW, this is why we have a post-capture proofing step, careful timeline scrubbing. I caught 3 capture errors on a 50+ tape project last weekend (intermittent mistracking). Most people are not that diligent, and only notice errors much later. Recaptures are fine. |
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Or are you referring to Vsync/Hsync? Have you encountered any frame drops on the capture card side with the DMR-ES10 in-line? As you say, any TBC will drop/insert frames internally when the input is bad enough. But the output SIGNAL coming from the buffered DAC should be stable regardless, even if the video within that stable signal is FUBAR. :hmm: |
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